Charles a



I (No madam I 4 0. A LIEB.

TOOLPOIST FOB. LATHES. No. 272,277. Patented Feb. 13, 1883.

invnmon WITNESSES: I

UNITED STATES PATENT OFFICE;

JHARLES A. LIEB, OF NEW YORK, N. Y.

TOOL-POST FOR LATHES/ SPECIFICATION formingpart of Letters Patent No. 272,277. dated February 13, 1883. Application filed August 2, 1882. (So model.)

that the tool can be raised and lowered con veniently while it is in operation.

' The peculiar construction of my new mech anism is pointed out in the following specifi- I cation.

In the accompanying drawings, Figure 1 represents a vertical central section in the plane mm, Fig. 2. Fig. 2 is a horizontal section in the plane y y, Fig. 1.

Similar letters indicate corresponding parts. In these drawings, the letterAdesignates the tool-post, which is fitted to work up and. down without lateral play in a socketed stand,

B, said tool-post being provided with a feather-key, a, which engages with a seat in the interior of the stand B and serves to prevent the tool-post from turning round. The tool-post is hollow,anditisprovidedwith aninternalscrewthread, I), which engages with a screw-thread,

o 0, formed on the hub d of a bevel-wheel, O, which bears upon the surface of the slide-rest,

on which the stand B is secured. The bevelwheel 0 gears into a pinion,D,which is mount-,

from turning round. The stand B is split open I 5 on one side, and provided with a clampingscrew, F, for the purpose of compressing the stand Band causing it to hug the tool-post firmly.

In the example represented by the drawings, a turning-tool, G, is secured in the slot ted revolving post H by the clamping-screw I. The post H is held up by a spiral spring, J, located in a cavity of the hub It will be readily seen that by applying a suitable handle or key to the horizontal shaft E the tool G can be raised or lowered whileit is in operation, the shaft E being in such a position that the key used for turning the same 'can be manipulated without coming in contact with the work, or with any portion of the tool-post or the parts connected to the same.

If desired, an emery-wheel or a milling-tool can be secured on the top of the tool-post A.

In this case the revolving post H must oe removed, so that the frame in which the emery- 6: wheel or milling-toolis mounted can be screwed down uponthe surface of the tool-post.

If my tool-post is used in combination with tools of this class, the great convenience of my mechanism for raising and lowering the toolpost will be fully appreciated by skillful mechan'ics.

I am aware that a tool-post has heretofore been constructed which can be raised and lowered by means of a rackformed on the toolpost, and a vertical worm mounted on the stand and gearing into the rack. This device, however, cannot be used (except with great inconvenience) for adjusting the tool while the same is in operation.

What I claim as new, and desire to secure by Letters Patent, is-

The combination of the socketed stand B with the tool-postA, connected with each other to prevent rotation of the post, the bevel-wheel 8 5 0, having the screw-threaded hub d engaging the internal screw-threads b of the tool-post, with the vertical bevel-pinion D, and its horizontal operating-shaft E, all constructed and arranged to operate substantially as shown c and described.

In testimony whereof I have hereunto set my hand and seal 'in the presence of two subscribing witnesses. CHARLES A. LIEB. [L. s.] Witnesses: W. HAUFF, OTTO HUFELAND. 

